3.1.7.9
Steel Slides
Where steel slides do not require provisions for restraint of lateral
movement, an alternate guide method may be used. On piping 100 mm 4 inches
and larger, a Type 39 saddle shall be used. On piping under 100 mm 4 inches,
a Type 40 protection shield may be attached to the pipe or insulation and
freely rest on a steel slide plate.
3.1.7.10
High Temperature Guides with Cradles
Where there are high system temperatures and welding to piping is not
desirable, then the Type 35 guide shall include a pipe cradle, welded to
the guide structure and strapped securely to the pipe. The pipe shall be
separated from the slide material by at least 100 mm 4 inches, or by an
amount adequate for the insulation, whichever is greater.
3.1.7.11
Multiple Pipe Runs
In the support of multiple pipe runs on a common base member, a clip or
clamp shall be used where each pipe crosses the base support member.
Spacing of the base support members shall not exceed the hanger and support
spacing required for an individual pipe in the multiple pipe run.
3.1.8
Pipe Alignment Guides
Pipe alignment guides shall be provided where indicated for expansion
loops, offsets, and bends and as recommended by the manufacturer for
expansion joints, not to exceed 1525 mm 5 feet on each side of each
expansion joint, and in lines 100 mm 4 inches or smaller not more than 610
mm 2 feet on each side of the joint.
3.1.9
Pipe Anchors
Anchors shall be provided wherever necessary or indicated to localize
expansion or to prevent undue strain on piping. Anchors shall consist of
heavy steel collars with lugs and bolts for clamping and attaching anchor
braces, unless otherwise indicated. Anchor braces shall be installed in
the most effective manner to secure the desired results using turnbuckles
where required. Supports, anchors, or stays shall not be attached where
they will injure the structure or adjacent construction during installation
or by the weight of expansion of the pipeline. Where pipe and conduit
penetrations of vapor barrier sealed surfaces occur, these items shall be
anchored immediately adjacent to each penetrated surface, to provide
essentially zero movement within penetration seal. Detailed drawings of
pipe anchors shall be submitted for approval before installation.
3.1.10
Piping Identification
Each piping system and direction of fluid flow shall be identified in
accordance with applicable provisions of ANSI A13.1 with color coded,
water, moisture and broad-spectrum temperature resistant, plastic labels.
3.1.11
Manual Valves
Stop valves shall be installed on each side of each piece of equipment such
as compressors, condensers, evaporators, receivers, and other similar items
in multiple-unit installation, to provide partial system isolation as
required for maintenance or repair. Angle and globe valves shall be
installed with stems horizontal unless otherwise indicated. Ball valves
SECTION 15652A
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